The 9th U.S. Circuit Court of Appeals handed a victory to the family of missing West Valley City mom Susan Cox Powell, allowing their lawsuit over the deaths of her sons to go to trial.In a ruling issued Thursday afternoon, the 9th Circuit Court reversed a lower court’s decision dismissing Judy and Chuck Cox’s civil lawsuit against Washington State Department of Social and Health Services over the 2012 deaths of Susan’s children, Charlie and Braden Powell.